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IL12RB1 · Western blot design guide
Design a Western Blot for IL12RB1
Real validated IL12RB1 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-IL12RB1 WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Last reviewed: May 2026 · Scientific review: Boster Bio technical team
IL12RB1 Western Blot Experimental Design Guide
Expected bands, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before running
| Expected band | ~73.1 kDa | |
| Observed band | ~70 kDa | |
| Gel | 10–12% | |
| Negative control | siRNA / KO lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Glycosylated + Cleaved | |
| Caveat | Heavy N-glycosylation | |
| Regulation | IL-6 up | |
| Isoform | 3 isoform(s) |
Section 1
Real Curated IL12RB1 Western Blot Protocols
Literature-validated Western blot parameters for IL12RB1 — gel percentage, transfer, blocking, antibody incubation and detection, extracted from published methods.
| Sample / lysate | HEPG2 . After Electrophoresis, proteins were transferred to a Nitrocellulose membrane at 150mA for 50-90 minutes. Blocked the membrane with 5% Non-fat Milk/ TBS for 1.5 hour at RT. The membrane was incubated with rabbit anti-IL12RB1 antigen affinity purified polyclonal antibody (Catalog # A03401-1) at 0.5 μg/mL overnight at 4°C, then washed with TBS-0.1%Tween 3 times with 5 minutes each and probed with a goat anti-rabbit IgG-HRP secondary antibody at a dilution of 1:10000 for 1.5 hour at RT. The signal is developed using an Enhanced Chemiluminescent detection (ECL) kit (Catalog # EK1002) with Tanon 5200 system. A specific band was detected for IL12RB1 at approximately 70KD. The expected band size for IL12RB1 is at 73KD |
| Gel % | 10–12% |
| Load | 50ug |
| Transfer | nitrocellulose membrane, 150 mA, 50–90 min |
| Membrane | nitrocellulose |
| Blocking | 5% non-fat milk / TBS, 1.5 h RT |
| Primary antibody | 0.5 µg/mL |
| Primary incubation | overnight at 4 °C |
| Secondary antibody | goat anti-rabbit IgG-HRP, 1:10000 |
| Wash | TBS-0.1% Tween, 3 × 5 min |
| Detection | ECL |
| Exposure / imaging | Tanon 5200 |
| Observed band | 70 kDa |
Section 2
What Is the Expected IL12RB1 Western Blot Band Size?
IL12RB1 has a 73.1 kDa predicted mass but is typically observed at ~70 kDa by Western blot, reflecting signal-peptide cleavage and glycosylation at up to six N-linked sites.
| Single band at approximately 70 kDa on reducing SDS-PAGE | corresponds to the mature, signal-peptide-cleaved IL12RB1 chain running close to its 73.1 kDa calculated mass |
| Band is diffuse or slightly broadened rather than a crisp line | reflects heterogeneous occupancy across the 6 N-linked glycosylation sites on the extracellular domain |
| Apparent size falls a little below the 73.1 kDa full-length calculated mass | removal of the 23-residue N-terminal signal peptide during maturation trims mass from the precursor |
| More than one distinct band at different apparent sizes | IL12RB1 has 3 annotated splice isoforms that can be co-expressed and differ in length |
| Little or no band in a cytosol-only or poorly solubilized lysate | IL12RB1 is a single-pass type I membrane receptor and requires adequate membrane solubilization to be extracted, not a soluble/cytosolic protein |
| Slight mobility shift between reduced and non-reduced samples | an intrachain disulfide bond (Cys52-Cys62) stabilizes a folded extracellular subdomain that migrates differently depending on reduction |
💡Expected IL12RB1 appearanceExpect a single, sometimes slightly diffuse band at approximately 70 kDa on reducing SDS-PAGE of membrane-containing lysate, consistent with mature, signal-peptide-cleaved, N-glycosylated IL12RB1 near its 73.1 kDa calculated mass.
| Predicted mass from UniProt (73.1 kDa, 662 aa) | sets the calculated baseline against which the ~70 kDa observed band is compared |
| N-terminal signal peptide (residues 1-23) | cleaved during maturation, so the mature membrane-bound receptor runs somewhat below the calculated precursor mass |
| N-linked glycosylation (6 sites, including Asn121, Asn329, Asn346, Asn352, Asn442, Asn456) | adds variable mass and can broaden or shift the band depending on glycoform heterogeneity across cell types |
| Intrachain disulfide bond (Cys52-Cys62) | stabilizes domain folding and can cause a modest mobility shift between fully reduced and non-reduced samples |
| Three splice isoforms (1, 2, 3) | can generate additional bands of different apparent size if more than one isoform is expressed in the sample |
| Situation | Likely cause | Next action |
|---|---|---|
| Weak or no signal | IL12RB1 is a receptor restricted mainly to activated T, NK, and myeloid cells, so many general cell lines express little of it | use lysate from IL12RB1-expressing cells such as activated PBMCs or NK cells and load sufficient membrane protein, as in the ~50 ug used for the reference blot |
| No band in lysate | the single-pass transmembrane protein was not solubilized because lysis buffer lacked adequate detergent or lysate captured cytosol only | use a lysis buffer with sufficient detergent (e.g. RIPA or NP-40 based) to solubilize the membrane fraction before loading |
| Broad smear instead of sharp band | heterogeneous occupancy and processing across the 6 N-linked glycosylation sites produces glycoform microheterogeneity | treat a parallel sample with PNGase F to collapse the smear toward a sharper core polypeptide band for confirmation |
| Multiple bands | co-expression of the 3 annotated splice isoforms, or a mix of glycosylation intermediates, can appear as separate bands | treat the ~70 kDa band as the primary mature product and check antibody epitope coverage against isoform sequences |
| Band lower than expected | signal peptide cleavage during maturation or partial degradation/deglycosylation reduces apparent mass below the 73.1 kDa precursor value | compare against the ~70 kDa reference band and use fresh lysate with protease inhibitors to rule out degradation |
| Fragments below expected size | proteolytic clipping of the extracellular domain during cell lysis or sample handling | prepare lysate fresh with protease inhibitors and minimize freeze-thaw cycles before loading |
Experiment evidence
Western blot images showing IL12RB1 band
A03401-1 · IL12RB1
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for IL12RB1 Western blot
🧪For positive controls for IL12RB1 in Western blot, you can use PHA-stimulated peripheral blood mononuclear cells (PBMCs) or activated T/NK lymphocytes, which are the immune cell populations known to express IL-12 receptor beta-1.
Positive control: Activated PBMCs/T cells
Negative control: Non-lymphoid cell line (e.g., HEK293); ubiquitously restricted to hematopoietic lineage, so consider siRNA knockdown or KO line to confirm specificity
Loading controls: Run GAPDH and β-actin antibody blots alongside a total-protein stain (stain-free gel, Ponceau S, or REVERT) to confirm equal loading and transfer.
⚠️Feasibility: No HPA tissue expression data are available for IL12RB1, and as a single-pass membrane receptor confined to lymphocytes, signal is likely low or absent in whole-cell lysates from non-immune tissue, so verify specificity with siRNA knockdown or a receptor-negative cell line.
Comprehensive Human Protein Atlas IHC scoring per tissue. Rows are taken directly from the HPA tissue chart — click any row's HPA link to view the source.
Positive expression · recommended positive controls
| Tissue | Cell type | Level | Evidence | Source |
|---|
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|
Section 3
Advanced IL12RB1 Western Blot Tips
Deeper troubleshooting and optimisation questions for IL12RB1, answered from its protein features.
Why does IL12RB1 run near its predicted 73 kDa mass?
Cleavage of the 23-residue signal peptide lowers mass slightly, while 6 N-glycosylation sites add mass back, roughly netting the observed ~70 kDa band close to the predicted 73.1 kDa unmodified mass.
Could IL12RB1 isoforms cause multiple WB bands?
IL12RB1 has 3 annotated isoforms from alternative splicing; if your antibody epitope is shared, expect a dominant band near 70 kDa plus possible minor bands corresponding to shorter spliced variants — check immunogen location against isoform sequences.
Does IL12RB1 expression need cell stimulation before blotting?
IL12RB1 is constitutively expressed at low levels but upregulated on activated T and NK cells; if band intensity is weak, confirm cells were activated (e.g., anti-CD3/IL-12 stimulation) before lysis, since resting cells may show minimal signal.
Should I use BSA or milk to block IL12RB1 blots?
Because IL12RB1 carries 6 predicted N-glycosylation sites, use BSA rather than milk for blocking if your antibody's epitope overlaps a glycosylated region, since milk glycoproteins can cause background or compete with glycan-directed antibodies.
What transfer method to use for IL12RB1 Western blot?
As a single-pass type I membrane glycoprotein near 70-73 kDa, wet transfer is recommended for efficient transfer of this larger transmembrane protein; if using methanol-containing buffer, keep methanol low (~10%) or use semi-dry with extended transfer time to avoid poor transfer of the glycosylated ectodomain.
How does dimerization affect IL12RB1 quantitation?
IL12RB1 forms disulfide-linked dimers/heterodimers with IL12RB2 or IL23R; always reduce samples with DTT or beta-mercaptoethanol before SDS-PAGE, or you may see a higher-MW dimer band alongside or instead of the ~70 kDa monomer, complicating accurate quantitation.
What explains truncated or missing IL12RB1 bands?
IL12RB1 has documented disease variants, including those linked to Mendelian susceptibility to mycobacterial disease, that can introduce truncating mutations; patient-derived samples carrying such variants may show a smaller or absent band rather than a technical failure of the assay.
Boster reagents
Best IL12RB1 Western Blot Antibodies
BosterBio's IL12RB1 antibodies are among the best-performing WB antibodies on the market — well cited, thoroughly validated, and orthogonally cross-validated against negative tissues and complementary methods.
Real WB data
Anti-IL12RB1 Antibody Picoband®
Cat # A03401-1
Our recommended anti-IL12RB1 antibody is a best-performing, extensively cited reagent for Western blot, rigorously validated through orthogonal approaches including negative-tissue controls and complementary detection methods, giving researchers high confidence in specific, reproducible detection of IL12RB1 across sample types.
Which to pick: Only one Boster antibody is catalogued for IL12RB1, A03401-1, which includes a validated Western blot image demonstrating specific detection—making it the clear, single choice for your IL12RB1 Western blot experiments; no alternative SKUs are currently available to compare.
Source: BosterBio IL12RB1 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry P42701.
- Human Protein Atlas. IL12RB1 tissue expression.